Reorganize project

- modularized
- change pdfbox version to latest 1.8.x relase, so it match now the
mustang sample

pdfa3-sample/src/test/java/pdfa3/TestPDFA3.java

@@ -0,0 +1,30 @@
+package pdfa3;
+
+import org.junit.Test;
+
+import pdfbox.PDFA3File;
+import pdfbox.PDFA3FileAttachment;
+import pdfbox.PDFAFile;
+
+public class TestPDFA3
+{
+
+  @Test
+  public void testPDFA3File()
+  {
+    PDFA3File.main(new String[] { "PDFA3File.pdf", "Messsage" });
+  }
+
+  @Test
+  public void testPDFA3FileAttachment()
+  {
+    PDFA3FileAttachment.main(new String[] { "PDFA3FileAttachment.pdf", "Messsage" });
+  }
+
+  @Test
+  public void testPDFAFile()
+  {
+    PDFAFile.main(new String[] { "PDFAFile.pdf", "Messsage" });
+  }
+
+}